Carbureter



F. D. MALT BY. CAHBURETER.

APPLICATION FILED OCT-10,1917- 1,379,772

Patented May SL 1921.

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A TTOR IVE Y5.

F. 'D. MALTBY.

CARBURETER.

APPLICATION FILED 00110.1917.

Patentd May 311, 19211.

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f q- Hill INVEN TOR. FRANK 'D. MALTBY BY w w ATTORNEYS.

WITNESSES M [BMW ATENT FRANK D. MALTBFZ, 0F BATTLE GREEK, MICHIGAN.

GARBURETER.

Specification of Letters Patent.

Patented May 31, 192i.

Application filed October 10, 1917. Serial No. 195,714.

T 0 all whom it may concern:

Be it known that I, FRANK D. MALTBY, a

I citizen of the United States, residing at Battle Creek, Michigan, have invented certain new and useful Improvements in Carbureters, of which the following is a specification.

This invention relates to improvements in carbureters.

The main objects of this invention are:

First: to provide an improved combined carburetor and priming device.

Second, to provide an improved carbureter in which the feed of determined. amounts of fuel may be readily secured.

Third, to provide in a carbureter an im proved priming device.

Further objects, and objects relating to details and economies of construction and operation will definitely appear from the detailed description to follow.

I accomplish the objects of my invention by the devices and means described in the following specification. The invention is clearly defined and pointed out in the claims.

A structure constituting a preferred em bodiment of my invention is illustrated in the accompanying drawing forming a part of this specification, in which:

Figure I is a detail side elevation of an engine equipped with my improved carbureter and priming device.

Fig. II is a detail vertical section on a line corresponding to line 2-2 of Fig. I.

Fig. III is a detail horizontal section on a line corresponding to line 33 of Fig. II.

Fig. IV is a detail vertical section on a line corresponding to line 4-4 of Figs. II and III. I

Fig. V is a detail horizontal section on a line corresponding to line 55 of Fig. IV.

Fig. VI is a sectional View on a line corresponding to line 66 of Figs. IV .and V showing details of the pump drlving means. I Fig. VII is a detail section on a l1ne corresponding to line 77 of F 1g. I showing details of the air and water control.

Fig. VIII is a detail section to the discharge or delivery ports ofthe fuel feed valve."

Fig. IX is a transverse section through the inlet ort of the fuel feed valve.

Fig; is a diagrammatic view showing the ports of the fuel; valve. g

Fig. XI is a detail section one llne corresponding to line 11-11 of Fig. XII,

showing the arrangement of the valve and priming pump control members and the index and indicia members associated therewith.

Fig. XII is a detail longitudinal section on a line corresponding to line 1212 of Fig. XI.

Fig. XIII is a detail front elevation of the control valve finger piece and its index.

In the drawings, similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawings, 1 represents a six cylinderengine having the manifold or inlet passage 2 formed therein. The ,inanis fold is ,forined in the engine body as is the case with certain types of engines now constructed. These parts are mainly. shown conventionally.

My improved carburetor comprises a body member 3 having a venturi passage 4: delivering directly to the manifold, as shown in Fig. II. The body member is provided with an attaching flange 5. "Within the carbureter is a horizontally disposed nozzle 6 delivering centrally of the venturi. The feed valve casing 7 is, in the structure illustrated, formed integrally with the body member 3 and is disposed transversely to the nozzle. The feed regulating valve 8 is in the structure illustrated of the rotary tapered or plug type and is provided with a chamber 9 and an inlet port 10, connecting with the chamber and with a-peripheral inlet groove 11. This groove, when the valve is open, rggisters with an inlet passage 12, see Fig. I

The valve is provided with a plurality of discharge ports 13 of varying size or graduated in size, the ports being'arranged in the same plane so that they maybe successively brought into register with the nozzle, thus controlling the fuel feed of the nozzle. The arran ement of the ports is diagrammatically-lllustrated in Fig. X.

The stem 14 of the valve is preferably extended through the dash or instrument board 15, shown conventionally in I, and provided with a finger piece 16, an index 17 andan indicia member 17 having numerals or other indicia thereon, as shown in Fig.

XL'so that the operator is able to determine the position ofthe valve. This arrangement enables the adjustment of the feed valve to secure the desired opening. Valves hay ing threaded adjustment have been hereto.

fore provided for regulating the fuel feed, but in such valves, the operator does not know the extent to which the valve is opened. By providing the fuel feed valve with a series of ports, the operator knows by reference to the index and indicia what the valve opening is.

The carbureter is provided with an air intake 18 which may be connected to a suitable heater if desired. The throttle 19 is disposed in front of the nozzle 6. A spring controlled auxiliary air inlet 20 is preferably provided.

The carbureter is provided with a fuel reservoir 21 connected to a suitable source of supply by pipe 22 and controlled by a float valve designated generally by the numeral 23. The float valve is arranged so that the oil level is approximately that of the nozzle.

The assage 12 is connected with the fuelreservoir through the pump cylinder 24 which is provided with-a side inlet port 25, the inner end of the cylinder being connected with the feed valve through the passa e 12. When the plunger 26 is retracted, this inlet port 25 of the cylinder is opened so that the reservoir is normally connected with the feed valve through the cylinder. When the plunger is actuated, the port 25 is cut off and the fuel within the cylinder forced out through the feed valve which maybe adjusted to control the fuel delivered by the pump.

In the structure illustrated, I provide means for actuating the pump comprising the rack 27 on the plunger rod 28 and a train of gears, consisting of the gears 29, 30, and 31, driven by the coiled spring 32. By this actuating means, the plunger is driven at an approximately uniform speed so that the priming charge is delivered at an approximately uniform rate. The plunger rod 28 has a suitable extension or actuating rod 33, which reciprocates through the instrument board plate 34. The latch 35 coacts with the notch 36 in the actuating rod 33 to hold the plunger in its retracted position, as shown in Figs. IV, XI, XII. When the plunger is retracted, the spring is wound and is retained undertension by means of the latch 35. the primer, the latch is disenga ed and the plunger is actuated to deliver t e priming charge. I

I preferably provide, in this connection, a means for delivering an auxiliary supply of air tothe venturi'at 37 or for delivering water "at this point. The water acts as a de'carbonize'r. a ent andgenerally adds to the eiiiciency of the engine.

To controlthe delivery of air or water, a

When it is desired to actuate pipe 37 is connected to the valve casing 38 which has a passage 39 with which the pipe communicates. The valve casing has an air inlet port 40 and a water inlet passage or port 41 which is connected by the pipe 42 to the water circulation pipe 48. It is to be understood that this pipe 42 may be connected to any suitable source of water supply. The valve 44 may be adjusted to cut off both air and water or so as to admit either air or water. The stem of the valve 44 is provided with a finger piece 47 disposed through the instrument board plate 34 and provided with an index 48, the plate being provided with a suitable indicia, indicating the air and water position of the valve. In operation, to start the engine the plunger 26 is released. This cuts oil the passage 25 and the fuel is forced out through the feed valve which may be adjusted to control the delivery of the fuel by means of the several ports of difierent sizes in the valve. This provides a force feed for the fuel until the engine has time to warm up enough to operate properly under the normal suction feed.

I have illustrated and described my improvements in but one embodiment as I believe the disclosures herein will enable the embodiment orv adaptation of my improvements as may be desired. I desire also to mention that in the accompanying drawing I have not attempted to maintain the relative proportions of parts and that various parts are shown mainly in conventional form as the structural details thereof may be varied as required to meet existing conditions and the particular adaptations. Having thus described my invention, what I claim as new and desire to secure by Letters Patent is: 1. In a carbureter, the combination of a fuel reservoir, a nozzle, a fuel feed valve having a plurality of delivery ports of varying size, a pump cylinder having a side connection with said fuel reservoir and an end connection with said fuel valve, a plunger adapted when in. its retracted position to uncover said reservoir connection, and an actuating means for said plunger whereby said plunger is gradually actuated to deliver the priming charge at an approxi- -mately uniform rate during the delivery stroke of the plunger.

2. In a carbureter, the combination of a fuel reservoir, anozzle, a fuel feed valve having a plurality of delivery ports of varying size, a pump cylinder having a side connection with said fuel reservoir and an et/awe rying size, an indicia member associated therewith for indicating the said delivery ports, a pump cylinder having a side connection with said fuel reservoir and an end connection with said fuel valve, a plunger adapted when in itsretracted posltion' to uncover said reservoir connection.

4. In a carbureter, the combination of a nozzle, a fuel feed valve having a plurality of delivery ports of varying size, a pump cylinder connected with said fuel valve, a plunger, and an actuating means for said plunger whereby said plunger is gradually actuated to deliver the priming charge at an approximately uniform rate during the delivery stroke of the plunger.

5. In a carbureter, the combination of a fuel reservoir, a nozzle connected thereto,

said connection comprising a pump cyli nder having a side connection with said fuel reservoir and an end connection with. said nozzle, a plunger adapted when in its retracted position to uncover said reservoir connection, an actuating means for said plunger comprisin a driving spring and a train of gears w ereby said plunger is gradually actuated to deliver the priming charge at a practically uniform rate during the delivery stroke of the plunger, and a means for holding said plunger in its retracted position.

6. In a carbureter, the combination of a nozzle, a pump cylinder connected to said nozzle, a plunger, an actuating means for said plunger, comprising a driving spring and a train of gears whereby saidplunger is gradually actuated to deliver the primingcharge at a practically uniform rate during the delivery stroke of the plunger, and a means for holding said plunger in its retracted position.

In witness whereof, I have hereunto set my hand and seal in the presence of two witnesses.

FRANK D. MAL'IBY. [1,. s.-]

Witnesses:

M. E. Inrsri, I. W. SoHnAM. 

